Controlled fabrication of uniform hollow core porous shell carbon spheres by the pyrolysis of core/shell polystyrene/cross-linked polyphosphazene composites

Uniform carbon spheres with hollow core and porous shell structures were controllably fabricated through carbonizing fine core/shell particles of polystyrene/cross-linked poly(cyclotriphosphazene-co-4,4'-sulfonyldiphenol), obtained by a simple template approach.